Alien Arena is an open sourced game that combines a sci-fi atmosphere with the tournament style deathmatch of Q3A and UT2k4. Major graphical features such as GLSL per-pixel lighting, ragdoll physics, light blooms, real time lights and shadows, textured particles, shaders, and reflective water, create a colorful and immersive deathmatch atmosphere. The game also includes mutators, adjustable effects, bot skill settings, and fully configurable deathmatch, team deathmatch, CTF, All Out Assault, Team Core Assault, Cattle Prod, and Deathball games. The game features original artwork, with a dark, sinister atmosphere combined with an off-the-wall campiness, and trippy, techno type music. There are currently over 60 maps, loaded with weapons(each having an alternate firing mode) and powerups. Alien Arena has fast, smooth gameplay, & players can play online against one another or against the bots.
Please post all support issues in the forums for the game.

Version 7.20 features a host of improvements, optimizations, and new features such as the implementation of per-pixel GLSL effects including parallax, normal and specular mapping/highlighting, occlusion culling of entities, shader performance boosts, new and improved weapon/event effects, and much more. The end result is a game that not only looks great, but also runs considerably faster than previous releases.

On the gameplay aspect, a brand new reward system has been implemented, allowing players to choose from three power-ups when reaching a certain achievement total. Weapons have received further balancing, power-up effects made more smooth, and various bugs have been squashed. Several brand new levels have been added, as well as player skins that improve visibility and an HUD based weapon inventory.